Accessing the MorphTo class in Nova ->dependsOn

I have the following code in a Nova resource:

            MorphTo::make('Recipient', 'messageable')
                ->types([
                    User::class,
                    Group::class,
                ]),

            Select::make('Type')
                ->dependsOn(
                    ['messageable'],
                    function (Select $field, NovaRequest $request, FormData $formData) {
                        if ($formData->messageable instanceof \App\Models\User) {
                            $field->options([
                                'option 1' => 'Option 1',
                                'option 2' => 'Option 2',
                            ]);
                        } elseif ($formData->messageable instanceof \App\Models\Group) {
                            $field->options([
                                'option 3' => 'Option 3',
                            ]);
                        }
                    }
                ),

It's not working as $formData->messageable returns a string, the id of the model instance being referenced. How can I get the model type of the messageable being references?